I needed to make a cell charger for trips and events as the season is upon us. I happened to have old connector in my nut and bolt bucket that matched the trickle charger harness that was on the bike when I bought it.
Got the plug/cord combo from a big box retailer down the street. A little solder and heat shrink tubing and...
Finished product. Couple that with a low profile usb plug, done and done.
Of course, it helps if you bring the right charging cord. As I unfortunately discovered recently the concept is useless if you only pack half of what you need.